CN1043268C

CN1043268C - Method for cleaning double-seat valves and valve device for performing method

Info

Publication number: CN1043268C
Application number: CN92104451A
Authority: CN
Inventors: 汉斯·奥托·米斯
Original assignee: Otto Tuchenhagen GmbH and Co KG
Current assignee: Otto Tuchenhagen GmbH and Co KG
Priority date: 1991-06-07
Filing date: 1992-06-08
Publication date: 1999-05-05
Anticipated expiration: 2007-06-08
Also published as: US5575305A; KR100211487B1; JP3141082B2; ES2083749T3; ZA923791B; IE71200B1; WO1992021900A1; AU664842B2; DE59204614D1; EP0587690B1; IE921852A1; GR3019029T3; DE4118874A1; DK0587690T3; EP0587690A1; ATE131264T1; CN1067723A; AU1903092A; DE4118874C2; PL169375B1

Abstract

Disclosed are a process for cleaning a double seat valve, in particular a low-leakage or non-leaking double seat valve; and a valve device for carrying out the process. The aim is to ensure among other things that the relevant areas of the double seat valve can be cleaned with the minimum of detergent and/or disinfectant, in the interests of economy and the environment. To this end, provision is made in the process to clear a passageway, which leads off from part of the valve casing, by partially opening a closure element; the detergent stream flows through this passageway and cleans both the passageway (A or C) of the rod at its branching off point and at least one of the following areas: the other rod passageway (C or A), the leakage cavity, or the now accessible seat area.

Description

Clean the control valve unit of method and this method of enforcement of double seated valve

The present invention relates to a kind of method and a kind of control valve unit of implementing this method that cleans double seated valve.This method is used for cleaning especially leaking less or not having leaks the double seated valve of connecting (action).

Such method is disclosed a kind of by DE3108778C2.The task that this method solves is that two valve seat surfaces to closure member clean simultaneously in the valve of mentioned kind.For this reason washing agent and or disinfector will from the double seated valve outside through leak cavity or through a valve casing partly be transported to two by the open valve seat surface that comes out on (referring to accompanying drawing 1-5a).

In EP-A-0208126, the DE3108778C2 disclosed method is further developed, promptly in a double seated valve with guiding valve and valve disc, for being carried out feelings, the valve seat part of the closure member of guiding valve shape washes, this closure member can be along independent moving on the direction of the valve casing part that matches, and that valve disc remains on its valve seat surface is motionless, and washing agent is transported on the valve seat surface that has exposed from the double seated valve outside through leaking cavity.The same with previous method, this method is that valve seat location contributes for the relevant position of cleaning double seated valve.But require in the reality in cleaning process, also will relevant position for example to be passed these positions of the bar passage of the valve casing part that matches and clean.

Valve for the closure member with sliding valve structure need take some measures, so that can accept the pressure of liquid effects to the closure member in the pipeline.These pressure or can in valve activator, take suitable measure to compensate, perhaps in the valve casing zone, on closure member, take the pressure balance measure compensate (referring to EP-A-0039319, Fig. 1; EP-A-0208126, Fig. 3 .2).First kind of measure causes driving mechanism to have sizable size, and taking the pressure balance measure in view of essence, to need big bar passage on the closure member, because its seal length is very long, consider the mixing of product and cleaning liquid, this measure all is problematic in cleansing power and Security.

Known by EP-A-0039319, a chamber is set, its available washing agent flushing between the Sealing of pressure balance piston.In order to guarantee that washing agent has enough passing capacities (or flow) is that the place must have enough big static pressure in the introducing position of washing agent, yet, generally all try hard to make washing agent not have pressure as much as possible at rod seal place facing to valve casing part inner chamber for the consideration on the safety.But in certain time interval, to consider in any case, can supply with washing agent or the moistening processing of washing agent at the position of Sealing back (because the connection campaign of valve can be drawn in product in this position) and the surface of contact of asking of Sealing and bar with relatively large girth.In DE-3701027A1, illustrated (seeing Fig. 7 .8) two serial connections, by sealing station and the acting in conjunction of a guiding valve shape closure member that shell-side is determined, its gap, centre can be washed.How respectively the document shows in the zone of a sealing station therein two sealing stations is cleaned, and comes out and whole valve seat location that will closure member is open.In the above-mentioned accompanying drawing of quoting the integral seal that has two sealing stations has been shown, and also can obtains the deployment scenarios of Sealing from specification preface part and claims, they are made up of two Sealings that separate.The closure member of the Sealing that is arranged in case side of two alternate settings and a guiding valve shape structure or a bar acting in conjunction of stretching out from valve casing, part by closure member or bar moves, and the valve casing part of washing agent is open comes out so that certain Sealing wherein has with respect to that.The situation that two Sealings of such setting are cleaned in the desired priority text WO88/05512 of above-mentioned DE370127A1, done detailed description (referring to, Figure 21 for example, 22,25,26 and 59,60).

At last by among the document 8813258U1 as can be known, double seated valve with closure member of valve disc shape and guiding valve shape, the pressure that wherein acts on the guiding valve is compensated by a pressure balance piston that constitutes on guiding valve, and this double seated valve is in the facial position of slide valve support and passing how can utilize by above-mentioned document in the access site of pressure balance piston of valve casing part and prove what disclosed technological scheme feature was cleaned.It should be noted that, from following valve casing part, distribute two gangs of parallel purge flow (r1, r2), wherein one (r1) open valve seat surface of flowing through guiding valve shape closure member is through leaking cavity and a pipe that partly stretches out from valve casing flows into the surrounding environment of valve downwards, and another strand (r2) partly flows out from valve casing through the open passage of pressure balance piston and enter the valve surrounding environment.

This known solutions has many shortcomings, and the first be difficult to be measured the washing agent stream (r1) that the open seat surface through guiding valve shape closure member passes through, thereby can not eliminate situation that washing agent consumes uncontrollably and the environmental pollution that is associated therewith.It two is to need second strand of parallel washing agent stream (R2) for shortcoming, cleans another key position of double seated valve, i.e. the access site of the pressure balance piston of closure member.In addition, the same crucial position of other of double seated valve but fails to obtain to clean.These positions are meant under certain conditions, sometimes the confession of valve disc structure has the valve seat surface (fitting surface) of the closure member of product, and under any circumstance, pass the operating handle of the passage of operating handle of valve casing part of top and guiding valve shape closure member and surround sealing position between the valve disc hollow stem of this bar.

With the above-mentioned shortcoming of prior art with to its requirement is starting point; task of the present invention provides the described method of a kind of beginning, and this method is can be in the use amount of washing agent and/or disinfector minimum and economical and protect under the condition of environment and guarantee the relevant position of double seated valve is cleaned.

When adopting method as suggested in the present invention, only just can realize all region of interest of double seated valve cleaning with one washing agent stream, and this strand washing agent stream be by sliding valve structure the partial journey motion of closure member on its bar passage from the valve casing that matches partly acquisition.By this partial journey, relatively the valve casing part is open comes out for the passage of the operating handle of closure member (A or C), thereby washing agent stream can flow through from here, so that at least to the passage of the operating handle at branch location place, another bar passage leaks cavity and come-at-able valve seat location and cleans.

When two valve casing part perpendicular upper and lower settings and in the valve casing of the top part washing agent being arranged, it is particularly advantageous then using first kind of method of being advised among the embodiment.In this case, washing agent stream does not need branch just can one after the other press order arbitrarily, all above-mentioned region of interest that best longshore current journey direction is cleaned double seated valve from top to bottom again.Because washing agent stream is transported in the mode of jet basically and does on the come-at-able valve seat location, and be transported under the effect of gravity on the position of other two postposition in the mode of standard sprinkling moisture film, therefore in washing agent, can not form disadvantageous pressure in this course to increase; Certain this advantageous method modification also depends on the position of valve, only is applicable to certain thus but also a lot applicable cases.

If can only locate to obtain washing agent (this equally also selectively uses in the method for being advised) by another bar passage (C) below being positioned at, wherein at first clean the bar passage (A) of top, afterwards along from top to bottom flow process, washing agent stream is continued to guide to come-at-able valve seat location and is leaked cavity, so just require to locate washing agent stream and have a sufficiently high pressure, to guarantee that effectively cleaning is carried out enough at the position of back at bar passage (A).Shortcoming on this principle (pressure at bar passage place) is promptly cleaned all sites with one washing agent stream, thereby is realized purpose of the present invention most effectively with relative by the obtained advantage of connecting in turn of position to be cleaned usually.

The method of the present invention's suggestion also has another embodiment, the position of double seated valve (hereinafter to be referred as valve) can not be depended in its use, wherein washing agent stream not only can be from a valve casing part but also is obtained from another valve casing part, and does not have the shortcoming in the preceding method.It is achieved in that promptly, and washing agent stream is split into part stream Ri at the branch location place of bar passage back, these parts streams to valve can be side by side or side by side and before and after each region of interest of connection clean.This moment, whole plume R and its part stream Ri were to force stream to be delivered on the position that will clean, can guarantee all the time that thus each crucial bar passage is the terminal point rather than the midship of part stream always.

As defined in the another kind of scheme of method of the present invention, under most of applicable cases, total stream R is branched off into that two bursts of parts flow R1 and R2 is just enough, wherein one (R1) cleans come-at-able valve seat location and leaks cavity, and another strand (R2) cleans another bar passage (C) or (A).

Adjusting and measurement that part quantity relative ratio relationship stream or that it is mutual is determined are possible.Generally speaking, for the come-at-able valve seat location and the leakage cavity of cleaning valve, its required washing agent is the several times that are used for the washing agent of cleaning rod passage.Therefore these parts for example flow the relation of R1 and R2 and regulate according to R1/R2＞1.

Method of the present invention both can be used for having the double seated valve of the closure member of two sliding valve structures, also can be used for having the closure member of a sliding valve structure and the double seated valve of a valve seat disk.Under a kind of closure member configuring condition in back, valve seat disk (or claiming valve disc) remains on its valve seat surface (fitting surface), and the closure member of sliding valve structure is left away from valve disc in partial journey.Therefore the seat surface of valve disc is not cleaned in adopting the procedure of being advised.

As long as in double seated valve, be provided with the closure member of two guiding valve shapes, then advised two different partial journeys according to method of the present invention so.One of them partial journey modification is characterised in that two closure members have moved reverse partial journey, and the washing agent stream at the bar passage place of a closure member is branched therein, and the partial journey of this closure member is to distribute facing to the opening direction of valve.In another partial journey modification, two closure members have moved partial journey in the same way, the washing agent stream at the bar passage place of a closure member is branched therein, and the partial journey of this closure member be distribute facing to the opening direction of valve and these closure member right and wrong driven independently.

Utilize a suitable servo-actuating device can on same control valve unit, realize above-mentioned two kinds of partial journey modification, from and can guarantee the present invention's obtainable advantage in its gamut can both be applied on the same valve in any situation, all it doesn't matter and washing agent is arranged in that valve casing part.For this situation, promptly for example valve be open downwards and washing agent is arranged in the valve casing part of top, and below the valve casing part in may be for product be arranged, so a reverse partial journey motion after above the bar passage just can be ready to washing agent and flow.If the part of the valve casing below being arranged in a kind of situation washing agent can make open the opening of bar passage of below by the inphase component stroke motion facing to the opening of valves direction, thereby can be with the washing agent flow branching from below valve casing part.May be in the valve casing part above this moment for product is arranged.Two kinds of partial journey modification can make sometimes and move for the direction of the closure member that product is arranged along the valve casing part of carrying product, thus will be before shift out from leak cavity for the valve seat location that part covers that is closed that product is arranged, and make the washing agent stream can be approaching.

When two closure members are sliding valve structure and opening direction valve is from top to bottom the time, the control valve unit of implementing institute's suggesting method so then demonstrates its special advantage.In this case, the branch that locates of washing agent bar passage (A) up realizes by the partial journey that the guiding valve that is positioned at the top carries out facing to the opening of valves direction.The guiding valve shape closure member that is positioned at the below simultaneously moves down a reverse partial journey, thus and former equally come out by open at two valve seat surfaces in the closed position place of valve.The washing agent that branch comes out from the valve casing part of top at first cleans the bar passage of top, then arrive the adjacent leakage cavity of come-at-able valve seat location and valve, bar passage below last inside at the pipe that extends downwards flows to the spraying liquid film, flow out from here again, enter in the surrounding environment of valve.

Be implemented in washing agent stream R and be branched off into the control valve unit that two bursts of parts flow the method for the usefulness of advising among R1 and the R2, its feature is except that others, be that bar passage (A) is located or change a kind of situation at first to be transported to a branch location at the washing agent stream R of square bar passage (C) place acquisition down up, be branched off into two bursts of parts from here and flow R1 and R2.Part flows R1 enters valve through a linkage section of branch location and environment leakage cavity, and another part stream R2 is fed to a hole that is provided with vertically at the operating handle that is being arranged in inside from branch location, continues from here to guide in another bar passage (C) or the bar passage (A).

State as preceding, the use of the control valve unit of the whole stream R of band branch can with location independent, especially also under the horizontal arrangement situation.This situation is especially favourable when using this valve at flow container discharge port place, because the one side flow container is laid highly greatly reduces, and can directly be contained on the flow container for the valve casing part that product (loaded by product) is arranged on the other hand.

Utilize this mode that the washing agent stream at bar passage place is carried out can there be control in branch very much to washing agent stream on the home position of washing agent stream or certain position on other follow-up flow circuits mensuration.When washing agent stream after pass valve in the process of forced flow and and then cleaned the bar passage when branch location is branched off into some parts and flows, under this control valve unit situation, the part stream that is used to clean another bar passage will pass through a throttle clearance before reaching this not open bar passage of opening.Guaranteed that by this measure this sometimes may be for there being the bar passage place that matches of product can be owing to washing agent is set up any unallowed pressure.Be used to clean can be approaching valve seat location and the part stream of adjacent leakage cavity be not serious on build-up pressure because it is to enter this through position that a big flow section is connected with the valve surrounding environment with accurate free jet.

The necessary Facilitation of the control valve unit of advising in order to make overcomes possibly little, and the closure member in the zone of each valve casing that matches part should be able to have such shape, makes that the pressure of liquid effects on closure member in the valve casing part is offset widely.For this reason among others, stipulate that first operating handle passes the valve-seat diameter that with the form of a pressure balance piston its diameter is increased to valve in valve casing passage (A) zone partly at it.

As the another kind of structure defined of control valve unit, if its diameter increases to when being similar to valve-seat diameter in the whole expanded range of the Guan Zaiqi that links to each other with second operating handle between closure member and its passage, no longer flow through the situation of crucial valve portion so before and after the branch ground in succession at washing agent, can provide advantageous conditions for cleaning liquid forms the sprinkling film on inner tube wall on the one hand, on the other hand, prevent to leak pressure in the cavity set up the aspect (for example since valve base seal have problem or since the closure member of top be not according to the rules or requirement open etc.) can obtain favourable relation or the condition that can consider.

In order in same a kind of structure of control valve unit, to realize the washing agent stream of aforementioned two kinds of partial journeys, be used for so with the first shaft seal upper area or the second shaft seal lower zone in the part stream R2 of the washing agent stream connection mouth of drawing should be able to open and close on remote control ground.

Carry out the inphase component stroke again if should carry out reverse partial journey in the control valve unit of being advised, how these independent partial journeys stipulate it is to be subjected to special bioassay standard restriction in the another kind of favourable structure of control valve unit of the present invention so.Make the open one side of each bar passage require certain minimum stroke, on the other hand when not making this bar passage open then this minimum stroke should not reach again, but stroke directions is owing to must be open go out valve seat surface and consistent with the direction of the open partial journey that goes out passage when the motion of in the same way partial journey.In this case, though the partial journey direction of each closure member is identical, vary in size.But because the section of extending axially of the public valve seat surface of two closure members is limited, when oppositely partial journey moves, two closure members also must have a minimum safety clearance apart from each end of valve seat surface, therefore, according to one of control valve unit favourable structure, closure member is axially to stagger to be provided with on the direction of second closure member with respect to they position of rest at the closed position place of control valve unit.Partial journey modification in the same way is inessential for having kept the essential safety clearance apart from valve seat surface, because the closure member adjacent with the edge of valve seat surface will carry out a much bigger partial journey according to the rules in reverse partial journey modification.

A kind of embodiment who implements the control valve unit advised has been shown in the accompanying drawing, below it has been described in detail.In the accompanying drawing,

Fig. 1,1a respectively are that wherein control valve unit is in the closed position by the sectional view of a central cross-section of control valve unit of the present invention, and the seal arrangement in first closure member has nothing in common with each other,

Fig. 2, the view that 2a is shown in an open position for control valve unit among Fig. 1 and the 1a,

Fig. 3 is in cleaning positions for control valve unit shown in Figure 1, and the bar passage (A) on its top is by open-minded, and the washing agent stream (reverse partial journey motion) of one branch is arranged,

Fig. 4 is in cleaning positions for control valve unit shown in Figure 1, and the bar passage (C) of its underpart is by open-minded, and the washing agent stream (partial journey motion in the same way) of one branch is arranged,

Fig. 5 is for realizing the schematic representation of the reverse or inphase component stroke identical with control valve unit shown in Figure 1.

(Fig. 1, valve casing 1 1a) are by valve casing part 1a, and 1b constitutes, and a seat ring 2 passes the connection part of these two valve casing parts for double seated valve.The

closure member

3 and 4 of two guiding valve shapes (slide plate shape) is housed in the cylinder seat surface 2a in seat ring 2, they can slide, but and relatively move, utilize Sealing 13a or 13 also can relatively move to axial seal. with utilizing

valve base seal

13 and 14 radial sealsThe closure member 4 that is positioned at the below prolongs into a pipe 4a, this Guan Zaiqi be positioned at closure member 4 and its pass below whole expanded range between the passage (C) of valve casing part 1b, its diameter increases to the diameter that is similar to valve seat.Not only the closed position of valve and also on open position at closure member 3, all constitute one between 4 and leak cavity 6, pipe 4a constitutes connection on the one hand between cavity 6 and valve surrounding environment, constitute the pressure balance piston on the other hand, to carrying out balance to the pressure on the closure member 4 by the liquid effects among the valve casing part 1b.Pipe 4a seals in valve casing part 1b through second shaft seal 7, and utilizes the guide ring 11 in a tube-shaped joint that is not shown specifically radially to place valve casing part 1b.Closure member 4 links to each other with second an operating handle 4b by the coaxial encirclement of pipe 4a through pipe 4a and link 4c, and this second operating handle 4b extend among the Effector D who is contained in above the valve.In link 4c inside one second hole 4f is set at least, it is connected second shaft seal, the 7 second following chambers 10 with a hole 4d who is contained in vertically in the second operating handle 4b.

First closure member 3 has been equipped with the first operating handle 3a of a hollow stem structure on the second operating handle 4b that is bearing in second closure member 4, and this bar 3a is extended to pressure balance piston (head) 3b that a diameter increases to valve-seat diameter in it passes passage (A) position of valve casing part 1a.This piston 3b is separated out one first chamber 8 through first shaft seal 5 from valve casing part 1a, one second guide ring 12 is used for the operating handle 3a that stretches out from valve casing part 1a is led in the component area that other is not shown specifically, and operating handle 3a and pressure balance piston join and constitute a continuity section.

Constitute an annular space 9 between the first operating handle 3a and the coaxial second operating handle 4b that stretches among the first operating handle 3a, its end links to each other with leakage cavity 6, and the other end deviates from the first-class hand-hole 4e that leaks cavity 6 one end places through one and links to each other with hole 4d.First chamber 8 has one first outlet 17 above first shaft seal 5, utilize first a remote-controlled interlocking device 21 can connect this first outlet 17.Second chamber 10 has second outlet 22 of available one second locking device 23 remote controls below second shaft seal 7.First chamber 8 deviates from first shaft seal, 5 one end places at it a cross section expansion, and it is formed by the annular groove that constitutes among the pressure balance piston 3b.This cross section expansion on the closed position shown in the valve through a first throttle gap 15 be positioned at above the toroidal cavity that is not shown specifically link to each other.This toroidal cavity links to each other with annular space 9 through an attachment hole 3c at least.The pressure balance piston is guaranteed by one the 3rd shaft seal 18 with respect to the sealing that a valve casing that is not shown specifically that constitutes its edge partly carries out above the first groove 3e.The case side sealing problem of the first operating handle 3a that continues above pressure balance piston 3b is then solved by one the 4th rod seal bar 19.The 5th shaft seal 20 between the first and

second operating handle

3a and 4b constitutes the portion boundary that links to each other with leakage cavity 6 of annular space 9.

Below second shaft seal 7, pipe is provided with the second groove 4g of an annular among the 4a, and it links to each other with the second ostium 4f through second throttle clearance 16, and shown in extend in second chamber 10 on the valve closed position.A favourable structure of control valve unit is that one group of second groove 4g is set in this position, this group groove by separated, on the valve axis direction or its obliquely, constitute at some depressed parts of pipe 4a circle distribution.Can see the corresponding construction at the bar passage place on top by Fig. 3 a.

In the process of using the method for being advised, with (A), (B), (C) special mark is carried out at the relevant position of double seated valve, wherein the passage of the first operating handle 3a (in its pressure balance piston 3b zone) is represented with label (A), leakage cavity 6 and adjacent representing with label (B) near the valve seat location of washing agent stream, label (C) expression of the passage of the pipe 4a of the valve casing part 1b below passing.Closure

member

3 and 4 position of rest spacing represent with a, and possible oppositely or in the same way stroke represents that with label Tij label H then represents opening direction or opening stroke of control valve unit.

Fig. 2 and 2a show the open position of control valve unit, and wherein,

closure member

3,4 has moved down one from its valve seat surface 2a and position of rest spacing a and opened stroke H.According to structure shown in Fig. 2 a, first valve base seal 13 in first closure member 3 is except at

closure member

3,4 are in contact with one another the relative valve seat surface 2a in back plays outside the radial seal effect, also play the axial seal effect, leak cavity 6 like this and on the second valve casing part 1b direction, also sealing with respect to second closure member 4.This structure has guaranteed that the connection youngster of control valve unit do not leak, because all reach minimum between the closure member that contacts 3,4 and with the space of valve seat surface 2a.

Outlet

17 and 22 is being opened in such cases, because remote-controlled

interlocking device

21 and 23 is not controlled.But in inaccessible these outlets of this valve position also is possible.

By Fig. 3, as seen 3a utilizes operating handle 3a to make first closure member 3 along valve casing part 1a direction movable part stroke T ₁₁, pressure balance piston this moment first shaft seal, 5 coefficient sealing stations 3b and on the closed position of valve have also moved this partial journey along the direction of first chamber 8.Second closure member 4 moves a reverse partial journey T through the effect of its operating handle 4b simultaneously ₂₁The structure of pressure balance piston 3b in first shaft seal, 5 zones is designed to so in case of necessity, promptly at partial journey T ₁₁Passage in the scope (A) is being opened towards first chamber, 8 directions, branches out one washing agent stream like this from valve casing part 1b, introduces in the first adjacent chamber 8 by the passage of opening (A), enters in the annular space 9 through attachment hole 3c from here again.This strand washing agent stream is punished into two bursts of parts at a branch location V and is flowed R1 and R2, wherein partly flow R1 and enter leakage cavity 6 and adjacent come-at-able valve seat location 2a place (these two positions are represented with (B)) through annular space 9, part flows R2 and flows among the 4d of hole through first-class hand-hole 4e, flows to second chamber 10 of second Sealing, 7 belows from here through the second ostium 4f and second throttle clearance 16.Can design pipe 4a and first guide ring 11 this moment like this, promptly may make one quite little part stream r2 between them by flows into valve around in, and remaining most R2 is through second outlet, 22 outflows.In leaking cavity 6 zones, part flows R1 and is drawn towards adjacent at reverse partial journey T from the free valve seat surface place of

closure member

3,4 with position of rest spacing a ₁₁And T ₂₁In on the come-at-able seat surface 2a.Like this, be after passage (A) cleans to first relevant position, to second and third phase close position (B) and (C) carry out the cleaning of quasi-parallel.Outlet 17 is by interlocking device 21 sealing, reaches washing agent stream R that passage (A) locates and entered relevant cleaning position (B) and (C) forcibly thereby make.

If clean first chamber 8 of labyrinth-like ground, then can allow a quite little part stream r and flow out from exporting 17 towards outlet 17 direction branches.When measuring total discharge R (bringing up to R*), to consider this part stream.

With respect to the 3rd shaft seal 18 location, promptly washing agent stream R can enter the annular space 9 from first chamber 8 the first groove 3e among the parallel piston 3b of pressure in the clear like this.The first throttle gap is similar in bypass and detours like this, thereby washing agent stream R is not subjected to throttling in this position.This is relative, second throttle clearance 16 is implemented its throttling function, prevents that thus part stream R2 from may cause any unallowed pressure to increase for second shaft seal, 7 places that product is arranged.

Fig. 4 shows another kind of cleaning method, and wherein, the washing agent at the cannula C place of managing 4a flows the partial journey T of R through second closure member 4 ₂₂Branch comes out from the valve casing part 1b of bottom, above-mentioned partial journey T ₂₂Be to utilize the operating handle 4b of closure member 4 to carry out along the direction of the first valve casing part 1a.Also utilize the operating handle 3a of closure member 3 to make first closure member 3 move partial journey T in the same way simultaneously ₁₂

The size of determining pipe 4a like this in first guide ring 11 is favourable, that is, one part stream r1 quite little in the washing agent is flowed out enter control valve unit around in (environment).Size on this one part stream is decided, can be at one washing agent stream of the channel C punishment expenditure R* of the pipe 4a among the second valve casing part 1b, it can guarantee to supply with other two position A and the required washing agent flow R of B, the second groove 4g of washing agent stream R in second shaft seal, 7 zones do not enter among the second ostium 4f with not being subjected to throttling, enter hole 4d from here, so that enter in the annular space 9 through first-class hand-hole 4e thus, punish into two bursts of parts at the branch location V of attachment hole 3c and flow R1 and R2.Illustrate as Fig. 3, part flows R1 and flows to leakage cavity 6 and adjacent free valve seat surface 2a, and partly flowing R2 enters first chamber 8 through first throttle gap 15, and this chamber 8 utilizes the 3rd shaft seal 18 to seal with respect to the toroidal cavity of pressure balance piston 3b top.Outlet 17 is opened, like this position (A) that can clean from the emphasis of first shaft seal, 5 tops of washing agent stream R2 come out to flow to control valve unit on every side.Because part flows R2 and must pass through first throttle gap 15 forcibly, thereby prevented from reliably to set up unallowable pressure may flowing among the R2 for the washing agent above first shaft seal 5 that product is arranged.

That those have made mark in Fig. 2 to 4 but all done detailed explanation in the description partly at Fig. 1 and 1a at corresponding parts or the label of describing part and not have to describe in detail.As long as the valve casing part 1a among Fig. 3 and 4, the inner chamber of 1b has been made mark with P, so just means in cleaning process may have product sometimes herein.

As long as these two kinds have the passage (A) opened or the different cleaning methods of passage (C) are applied on the same valve as required selectively, regulation so then should be carried out remote control and opens and closes being used to draw

outlet

17 and 22 that washing agent partly flows R2.

The necessary partial journey of these different cleaning methods has been shown among Fig. 5.The section of extending axially of the valve seat surface 2a of control valve unit represents with S, and it is opened direction and represents with H.The left-hand component of figure shows first and second

valve base seals

13 and 14 that are in the position of rest closed position of control valve unit (that is), has set position of rest spacing a.As seen from the figure,

Sealing

13,14 and

closure member

3,4 setting of on the direction of second closure member 4, staggering vertically in valve seat 2a inside.Portion in the drawings is as

Sealing

13,14 reverse movable part stroke T ₁₁And T ₂₁After, then Sealing 13,14 respectively occupies its position, outer end.First valve base seal has an edge spacing b1 apart from valve seat surface 2a upper end portion 13 this moments, and second valve base seal 14 has an edge spacing b2 apart from valve seat surface 2a underpart.In the right-hand component of figure,

closure member

13,14 moves out from its position of rest, has moved partial journey T in the same way ₁₂And T ₂₂

Can notice partial journey T ₁₁And T ₁₂Or T ₁₂Or T ₂₂Be different.This is a generation of forced thus, that is, and and through partial journey T ₁₁Passage (A) is opened, and the effect of partial journey just may be got out of the way (exposing) for the valve seat surface of second closure member 4 that product is arranged.Therefore make partial journey T ₁₁Greater than partial journey T ₂₁(also seeing also Fig. 3 herein).

In the inphase component stroke motion (referring to right-hand component among Fig. 5 and Fig. 4), the passage (C) of pipe 4a is at partial journey T ₂₂In open and T ₁₂Only discharge the seat surface of first closure member 3.Because it is this former thereby with partial journey T ₂-2 design than partial journey T ₁₂Want big, but still guarantee at the partial journey T that finishes in the same way ₁₂And T ₂₂The back second pass valve member 4 can just in time not be positioned at the first pass valve member 3 and not finish partial journey T ₁₂In the time of before before when the opened and closed positions place on occupied that position.In order to guarantee that thoroughly ideally cleaning first closure member, 3, the second closure members 4 finishes partial journey T ₂₂After should also not reach the closed position of first closure member 3; But enough safety clearance a* should be arranged.

Can be drawn by above-mentioned explanation,

closure member

3,4 can not divide in groups around the symmetry axis perpendicular to seat ring 2 running shafts on their closed position, but asymmetricly is positioned in the seat ring 2 at the closed position place.

The method of being advised and to implement 4 control valve units that this method exemplifies in fact be only to have realized for the first time with one unique purge flow all region of interest of double seated valve being carried out in succession cleaning; perhaps the passage back after exposing also can be to each position side by side by the washing agent flow branching; or add one after the other side by side and clean; and the use amount minimum of washing agent and/or disinfector, economic and protection environment.

But also the method for invention is not can only be used on the control valve unit of above-mentioned concrete proposals, and for disclosed many closing structures in the aforementioned documents, the various modification of opening direction and partial journey all are effective.As describing, these methods of the present invention can be used for such double seated valve, and they are equipped with attic base on the one hand, and the closure member of sliding valve structure is arranged on the other hand, and method wherein of the present invention has only been got rid of this valve and arranged.With regard to the requirement of do not have to leak connecting, the closure member of guiding valve shape in double seated valve is opened the process of motion, at first opening motion oppositely on carry out " taking out motion " (" abholbe-wegung ") (referring to a DE3108778C29) along the attic base direction.For method of the present invention, to the required safe manoeuvring device institute requirement of the operating handle of double seated valve closure member only be they should make double seated valve open motion along with opening stroke H, and can finish reverse partial journey T when on same control valve unit, realizing distinct methods ₁₁, T ₂₁Or stroke T in the same way ₁₂, T ₂₂

Claims

1. clean the method for double seated valve, be particularly useful for cleaning leakage less or do not have and leak the double seated valve of connecting, this double seated valve has the closure member through lever operation of two serial connection effects, seal one between the closure member and leaking cavity, at least one closure member carries out a partial journey, make washing agent can enter into the major part of valve seat location, this moment, valve seat location kept sealing, it is characterized in that, also make a passage open-minded by this partial journey, this passage is by a valve casing part branch, and one washing agent stream then flows through from this branch road, the passage (A or C) of the bar at this washing agent stream cleaning branch location place also cleans in the following position at least, promptly

--the passage (C or A) of another bar,

--leak cavity and

--come-at-able valve seat location.

2. according to the method for claim 1, it is characterized in that, the washing agent stream that comes out from valve casing part branch cleans the bar passage (A or C) that is positioned at branch location, and do not have under other the branch one after the other, in any order, preferably on the longshore current moving-wire route down at least to cleaning with the bottom:

--come-at-able valve seat location,

--leak cavity and

--another bar passage (C),

Perhaps:

--another bar passage (A),

--come-at-able valve seat location,

--leak cavity.

3. according to the method for claim 1, it is characterized in that behind the passage that has and then cleaned bar (A or C), washing agent stream is punished into some parts stream Ri in branch location, they clean the relative section of double seated valve, and these parts are to join before and after reaching side by side or side by side.

4. according to the method for claim 3, it is characterized in that, washing agent stream be divided into two strands of part streams (R1, R2), wherein one (R1) is to come-at-able valve seat part and leak cavity and clean, another strand (R2) cleans another bar passage (C or A).

5. according to the method one of among the claim 1-4, it is characterized in that two closure members have moved two reverse partial journeys, the bar passage place branch of a washing agent stream closure member therein, the partial journey of this closure member is that the opening of valves direction distributes vis-a-vis.

6. according to the method one of among the claim 1-4, comprise two guiding valve shape closure members, but one of them closure member drive, another closure member is then non-to be driven independently, it is characterized in that, two closure members move two partial journeys in the same way, and washing agent stream is in the bar passage place branch of a closure member, and the partial journey of this closure member is that the opening direction of valve vis-a-vis distributes and this closure member is non-drive.

7. according to the method one of among the claim 1-4, closure member and the closure member that structure is a valve seat disk of comprising a sliding valve structure, wherein but guiding valve shape closure member drive is characterized in that, guiding valve shape closure member is removed from the valve seat disk that rests on its valve seat surface in partial journey.

8. be used to clean double seated valve, especially leak less or do not have the method for the double seated valve of the connection of leaking, it has two closure members of being handled by the serial connection of bar control, surround one between the closure member and leak cavity, it is characterized in that, guide channel is come out and is cleaned agent to flow through by open, below the guide channel (A or C) at the bar of branch location is cleaned and cleans at least in the position one:

--the guide channel (C or A) of another bar;

--leak cavity and

--come-at-able valve seat location.

9. according to the method for claim 8, it is characterized in that, washing agent stream locates to be branched off into part stream (Ri) in introducing position (E) back branch location (V), wherein one part stream (r) is by throttling, it cleans adjacent shaft seal under approximate no pressure, then be discharged in the surrounding environment of valve, (R1 R2) replaces the washing agent stream that obtains in the passage of opening (A or C) place and continued to handle according to the stream R of one part in the described method among the claim 2-4 or part stream.

10. according to the method for claim 8 or 9, comprise two guiding valve shape closure members, it is characterized in that, be moved partial journey according to the closure member in claim 5 or the 6 described methods.

11. method according to claim 8 or 9, comprise the closure member of a guiding valve shape and the closure member of a valve seat plate-like, wherein guiding valve shape closure member is driven independently, it is characterized in that, guiding valve shape closure member leaves from the valve seat disk punishment that rests on its seat valve in partial journey.

12. implement the control valve unit of claim 1 or 2 or 5 described methods, comprise the pass valve member, its operating handle stretches out valve casing and links to each other with Effector from a side, first wherein relative with the Effector closure member can be driven independently by one first operating handle, second closure member drives by second operating handle, it is characterized in that, second closure member (4) links to each other with second operating handle (4b) through pipe (4a), this pipe (4a) surrounds second operating handle (4b) coaxially, the passage (A) of first operating handle (3a) in the valve casing part (1a) is arranged in operating handle (3a) and another closure member (4) at this operating handle of coaxial importing 93a through one) second operating handle (4b) between annular space (9) and leakage cavity 96) link to each other, closure member (3) is in the partial journey against the opening movement direction of valve, passage (A) is discharged washing agent stream thus by open-minded.

13. one of implement among claim 1 or the 3-6 control valve unit of described method, comprise closure member, their operating handle stretches out from valve casing with Effector in a side and links to each other, first wherein relative with the Effector closure member is through first joystick driver, second closure member is through second joystick driver, it is characterized in that, second closure member (4) links to each other with second operating handle (4b) through pipe (4a), pipe (4a) coaxial second operating stem (4b) that surrounds is provided with a hole (4d) vertically in second operating handle (4b), the passage (A) of first operating handle (3a) in its end and the valve casing part (1a) links to each other, the passage (c) of the pipe (4a) in the other end and the valve casing part (16) links to each other, on the connection highway section between hole (4d) and the passage (A) branch location (V) is arranged, rise from here and be provided with the linkage section that another links to each other with annular space (9), annular space (9) is to constitute between second operating handle (4b) that first operating handle (3a) and coaxial importing first handled in straight (3a), annular space (9) is connected with leakage cavity (6), when first closure member (3) carries out partial journey against the opening movement direction of valve, passage (A) or passage (C) are by open-minded, discharge washing agent stream (R) thus, this washing agent stream (R) branch location punish into part stream (R1, R2).

14. control valve unit according to claim 13, it is characterized in that, there is a first throttle gap (15) in connection highway section between passage (A) and the branch location (V) in the valve position of the pass of valve valve position or open wireless tunnel (C), and connecting the highway section between passage (C) and hole (4d) has one second throttle clearance (16) in the closed position of valve or the valve position of open walk (A).

15. the control valve unit according to one of among the claim 12-14 is characterized in that, pipe (4a) its diameter in the whole expanded range of closing between (4) and its passage (C) is similar to the diameter that expands valve seat to.

16., it is characterized in that first operating handle (3a) passes in passage (A) scope of valve casing part (1a) with the form enlarged-diameter of pressure balance piston (3b) diameter to valve seat at it according to the described control valve unit of claim 15.

17. according to the described control valve unit of claim 16, it is characterized in that, in first shaft seal (5) top or second shaft seal 97) outlet (17) or (22) of drawing the part stream (R2) of washing agent stream in the lower zone are that remote control ground opens and closes.

18. according to the described control valve unit of claim 17, it is characterized in that, by in first operating handle (3a) or pressure balance piston (3a) in one group of first groove (3d), perhaps realize the open-minded of passage (A and C) by one group of second groove (4g) in the pipe (4a), wherein every group all is that some are spaced apart from each other, along the valve shaft direction or with the valve shaft true dip direction on, the depression that on the circumference of operating handle (3a) or pressure balance piston (3b) and pipe (4a), distributes.

19. according to the described control valve unit of claim 18, the closure member that comprises two sliding valve structures, they can realize the partial journey motion, wherein their each Sealing remains on the valve seat location, it is characterized in that, can in a valve seat surface that matches (2a), carry out oppositely or in the same way partial journey (T at closure member (3,4) on the same control valve unit ₁₁, T ₂₁Or T ₁₂, T ₂₂), be provided with the partial journey (T of first closure member (3) for the passage (A) of opening first operating handle (3a) in the valve casing part (1a) ₁₁), in order to open the passage (C) of the pipe (4a) in the valve casing part (1b), second closure member (4) is provided with partial journey (T approximately equalised, in the same way ₂₂), under inphase component stroke situation, may be for the partial journey (T of first closure member (3) that product is arranged ₁₂) be to determine like this, promptly passage (A) keeps closing.

20. the control valve unit according to claim 19 is characterized in that, with regard to closure member (3,4) in the position of rest at control valve unit closed position place, closure member (3,4) is to be axially disposed within the valve seat surface (2a), promptly at reverse partial journey (T along second closure member (4) direction like this ₁₁, T ₂₁) in, T wherein ₁₁＞T ₂₁, can finish above-mentioned reverse partial journey (T when minimum apart from the safety clearance (b1 or b2) of each valve seat surface (2a) end ₁₁, T ₂₁).

21. implement one of claim 8-11 described method and according to claim 12-14, the control valve unit that one of 16-20 constitutes, it is characterized in that, in bar passage (A or C) parts, respectively there are the identical parts (24) of structure to be arranged between shell and pressure balance piston (3b) or the pipe (4a), it constitutes the gap of damming (15 or 16) with pressure balance piston (3b) or pipe (4a) on the one hand, constitute a tap hole (24a) on the other hand, be used for part shunting (r) is discharged to the surrounding environment of valve from one adjacent to chamber (24b) shaft seal (5 or 7) and that be made of parts (24) part.